Rushing openers aren't cheap openers,there's nothing cheap. An opener it's still an opener,no matter how it is,usually people tend to call cheap the moves they can't counter,as lifts,shovel,snapkicks etc.
Instead of judging people who rush you can try to find out a way to counter those moves. You can't just play like a human in Toribash,you have a certain mechanic and a certain gravity,use it!